[PATCH] kexec: lengthen the kernel command line image

Cliff Wickman cpw at sgi.com
Mon Feb 4 14:53:55 EST 2013


From: Cliff Wickman <cpw at sgi.com>

The crash kernel's boot command line is not long enough to contain the
necessary memmap= options for a large memory.

The fix is simple, as long as the boot loader's command line is also long enough.
I'm not sure about boot loader or kernel restrictions to this length.

Signed-off-by: Cliff Wickman <cpw at sgi.com>

---
 include/x86/x86-linux.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: kexec-tools-2.0.2/include/x86/x86-linux.h
===================================================================
--- kexec-tools-2.0.2.orig/include/x86/x86-linux.h
+++ kexec-tools-2.0.2/include/x86/x86-linux.h
@@ -180,7 +180,7 @@ struct x86_linux_param_header {
 	uint8_t _pad8[48];			/* 0xcd0 */
 	struct 	edd_info eddbuf[EDDMAXNR];	/* 0xd00 */
 						/* 0xeec */
-#define COMMAND_LINE_SIZE 2048
+#define COMMAND_LINE_SIZE (64*1024)
 };
 
 struct x86_linux_faked_param_header {



More information about the kexec mailing list